Tool holder
AssigneePascal Kabushiki Kaisha
InventorHiroshi Miyazawa
Life of this patent
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Abstract
A tool holder includes a plurality of elastic engagement pieces arrayed along an outer perimeter of a shank. During and after assembly, the elastic engagement pieces elastically abut at least an inner surface of a tapered hole in a main shaft joined to the tool holder and deform slightly in a radial direction. The elastic engagement pieces provide uniform engagement force with the main shaft over a broad surface area. An elastic flange provides additional elastic engagement and easy separation from the main shaft. Together, the elastic engagement pieces and elastic flange reliably engage and securely attach the main shaft to the tool holder while aiding disengagement.
Claims16
A tool holder, including a tool support section for securing a tool and a shank removably fitted and secured to a tapered hole of a main shaft of a machining tool, comprising:
- a plurality of elastic engagement pieces on said shank;
- said plurality of elastic engagement pieces disposed at an outer perimeter section of said shank at a plurality of positions along an axial center and abutting an inner surface of said tapered hole during an insertion and deforming in a radial direction;
- said shank being fitted into said tapered hole of said main shaft during said insertion and secured to said main shaft with said plurality of elastic engagement pieces elastically deformed in said radial direction;
- and
- a plurality of grooves extending longitudinally along said shank formed at said outer perimeter section of said shank.
A tool holder, for securing a tool support section on a tool to a main shaft of a machining tool, comprising:
- at least a shank on said tool support section;
- said main shaft including a tapered hole;
- means for elastically securing said shank in said tapered hole of said main shaft and eliminating vibration and attachment failure during a use of said machining tool;
- a plurality of grooves extending longitudinally along said shank formed at an outer perimeter section of said shank;
- a plurality of elastic engagement pieces in said means for elastically securing;
- said elastic engagement pieces arrayed concentrically around an outer perimeter section of said shank;
- said elastic engagement pieces extending away from said shank and elastically abutting an inner surface of said tapered hole during an insertion of said shank into said tapered hole;
- and
- said elastic engagement pieces elastically deforming in a radial direction during said insertion, whereby said means for elastically securing enables said elastic engagement pieces to absorb a plurality of use vibrations while maintaining a secure attachment to said main shaft.
Dependencies are inferred from the claim text.